Four-row tapered roller bearings can accommodate combined heavy radial and axial loads at low to moderate speeds. They are used almost exclusively in work roll applications such as rolling mills. SKF manufactures four-row tapered roller bearings in TQO and TQI designs, in many variants and with different features.
| Design variant/feature |
TQON/GW
|
| Bore type |
Cylindrical with helical groove
|
| d |
292.1 mm
|
Bore diameter |
|---|---|---|
| D |
422.275 mm
|
Outside diameter |
| B |
269.875 mm
|
Total bearing width over inner rings |
| T |
269.875 mm
|
Total bearing width over outer rings |
| d1 |
≈ 324 mm
|
Abutment diameter shaft |
| D1 |
≈ 379 mm
|
Abutment diameter housing |
| r1,2 |
min. 6.4 mm
|
Chamfer dimension inner ring |
| r3,4 |
min. 3.3 mm
|
Outer ring radius (chamfer) |
| Basic dynamic load rating | C |
3 800 kN
|
|---|---|---|
| Basic static load rating | C0 |
8 000 kN
|
| Fatigue load limit | Pu |
680 kN
|
| Comparative radial load rating | CF |
930 kN
|
| Comparative axial load rating | CFa |
142 kN
|
| Thrust factor | K |
1.87
|
| Limiting value | e |
0.31
|
| Calculation factor | Y1 |
2.2
|
| Calculation factor | Y2 |
3.3
|
| Calculation factor | Y0 |
2.2
|
| Mass bearing |
125 kg
|
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